what kind of...

[Blackhart]

This came on the live rock when I bought it and there are 3 or 4 of them. Just curious what they are. And thanks for all the help.

 

[Bainic]

Hard to tell but I'm guessing some sort of snail, I'm sure someone will recognize it.

 

[theJ]

Hi blackheart, that looks like a stomatella snail:
http://images.google.com/images?gbv=2&hl=en&q=stomatella&btnG=Search+Images

Reef safe and good grazers, but they die quickly. I usually get a population explosion, then a lot of die off, another explosion, another die off etc in a cycle like that.

 

[returnofsid]

I'd agree stomatella. Does it look like a snail wearing a "fingernail" shaped shell?

 

[Blackhart]

What about this?

What about this? There is a growthe of some sorts on the rock next to my coral. It is to the right of the edge of the coral and towards the bottom of the rock. Check out the photo, any help is as always appreciated.

 

[Kurt_Nelson]

Sponge. Harmless little cleaner upper.